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Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Fair value of consideration transferred: |  |
Cash | $ 344,265 |
Notes issued to sellers | 13,460 |
Consideration transferred | 414,682 |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Accounts receivable | 12,998 |
Prepaid expenses and other current assets | 2,305 |
Property and equipment | 138,831 |
Deferred revenue | (3,176) |
Deferred income taxes | (59,584) |
Total identifiable net assets | 152,769 |
Goodwill | 261,913 | $ 1,766
Accounts Payable and Accrued Liabilities [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Accounts payable and accrued liabilities | (13,345) |
Debt [Member] |  |
Fair value of consideration transferred: |  |
Liabilities incurred | 56,957 |
Contingent Consideration [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Other long-term liabilities | (15) |
Other Acquisition [Member] |  |
Fair value of consideration transferred: |  |
Cash |  | 3,555
Consideration transferred |  | 3,555
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Property and equipment |  | 1,079
Deferred revenue |  | (383)
Other long-term liabilities |  | (163)
Total identifiable net assets |  | 1,789
Goodwill |  | 1,766
Other Acquisition [Member] | Contingent Consideration [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Other long-term liabilities |  | (220)
Contracts [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | 31,700 |
Customer Lists [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | 15,794 |
Customer Lists [Member] | Other Acquisition [Member] |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles |  | $ 1,476
Other Intangibles |  |
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: |  |
Intangibles | $ 27,261 |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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